build: convert to sass maintained

Author: pengx17

.github/workflows/main.yml

@@ -17,9 +17,11 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: 14
-    
+
       - name: Install dependencies
         run: yarn install
+      - name: Build theme
+        run: yarn build
       - name: Release
         run: npx semantic-release
         env: